diff -r 000000000000 -r 6474c204b198 addon-sdk/source/lib/sdk/tabs/helpers.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/lib/sdk/tabs/helpers.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,41 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+'use strict';
+
+module.metadata = {
+  'stability': 'unstable'
+};
+
+
+// NOTE: This file should only export Tab instances
+
+
+const { getTabForContentWindow, getTabForBrowser: getRawTabForBrowser } = require('./utils');
+const { Tab } = require('./tab');
+const { rawTabNS } = require('./namespace');
+
+function getTabForWindow(win) {
+  let tab = getTabForContentWindow(win);
+  // We were unable to find the related tab!
+  if (!tab)
+    return null;
+
+  return getTabForRawTab(tab) || Tab({ tab: tab });
+}
+exports.getTabForWindow = getTabForWindow;
+
+// only works on fennec atm
+function getTabForRawTab(rawTab) {
+  let tab = rawTabNS(rawTab).tab;
+  if (tab) {
+    return tab;
+  }
+  return null;
+}
+exports.getTabForRawTab = getTabForRawTab;
+
+function getTabForBrowser(browser) {
+  return getTabForRawTab(getRawTabForBrowser(browser));
+}
+exports.getTabForBrowser = getTabForBrowser;